Ok, so I was curious. Venus Flytraps are carnivorous. So do they expel waste? And of so, how? Well, yes and no. Mostly no. While they do get their nutrients from animals, they don't really eat them. A fly will get trapped in the clutches , and will remain there while the plant has its way with it, and then their carcass is just released from then trap. Here's a photo of an example of said release.